There is nothing unique when it comes to DUAL WIELD tanking, over TWO HANDED weapon tanking when it comes to DKs (both Frost and Blood and even Unholy).
Threat will be higher with TWO HANDED weapon, and the main threat ability requires you to have SPELL HIT, so any talent in both Nerves of Cold Steel and Threat of Thassarian will be more or less useless.
Blood spec, as a whole, is better equipped for surviving big chunks of damage coming your way, which is why its the "best" tank spec a DK can get.
This does not mean you should be instantly kicked out of the raid if you want to play Frost or Unholy, both are "good enough" for any content except Lich King 25m hc and Halion 25m hc, that is if you know how to play them (you can tank these two as well if the healers are good, but Blood has a lot better toolkit for those fights).
This does not mean that if you think you know how to play Frost and Unholy DK tank that you will do a better job in surviving, Blood is still supreme, regardless of experience, preferences, "fun factor", and all the other things someone can use as an "argument to why Blood is not better", but you can do a "good enough" job for a kill I guess (as Frost and Unholy).
As Frost DK, you should be able to tank anything with this spec:
https://wotlkdb.com/?talent#j0EMoIhc...Ik00buh:pwmMV0
You can tweek it a bit with some changes like:
https://wotlkdb.com/?talent#j0EMoIbc...Ik00buh:pwmzV0
or anything else you have in mind, but the base stays the same.
Overall, Blood is still the best choice for any DK tank.
Frost and Unholy are good enough and should not be kicked out of the raid if they know how to play, just because of the choice they made when it comes to playstyle (which spec they chose to play).
If you ever get kicked from the raid after a WIPE, it might be that you didnt do a good job.
If you ever get kicked from a raid for reasons based on a SPEC you play (this goes from anything, FDK tanks, UDK tanks, Enha, Ele shamans, Assassin rogues, BM, Survival Hunters, etc...) the person that kicked you is a probably some low level life form human which you should ignore and never care what they think or have to say (this is of course if you know what you are doing with those specs and do a good enough job/DPS to kill any boss you face).
Bottom line is:
Learn how to play what you want to play, and you should be fine.
If you get kicked by a random that never saw you play what you chose to play, /ignore that low level life form and move on with life.